Need to hold aluminum bar blanks, 2" x 6" x 1" thick. I am thinking about making a custom vacuum chuck with about a .030 deep pocket for the blank to stop it from being able to slide . I need to do a .010 clean up on all sides, and drill 2 holes with counter bore. Looks similar to a Kurt soft jaw. I know there isn't a large surface for vacuum, but is there enough considering the light cuts?
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Will a Vacuum chuck work?
- Thread starter davesvo
- Start date
- Replies 23
- Views 4,208
bukwerm
Cast Iron
- Joined
- Nov 6, 2013
- Location
- Minneapolis MN
Well... There's one sure way to find out.... 
John Welden
Diamond
- Joined
- Mar 21, 2009
- Location
- Seattle
You could probably get about 150lbs hold down force on it with full vac.
Meh... Probably hold kinda.
Meh... Probably hold kinda.
bukwerm
Cast Iron
- Joined
- Nov 6, 2013
- Location
- Minneapolis MN
Really though, that's not a whole lot of hold down. About 180lbs with a perfect vacuum at sea level and the full 6 x 2 area. Since it won't be perfect, and you have to drill thru holes, I'd guess probably half that. To me that doesn't seem like enough even with a pocket... But others here can answer better than me.
bukwerm
Cast Iron
- Joined
- Nov 6, 2013
- Location
- Minneapolis MN
Why can't you cut soft jaws?
Need to put a bunch of parts on the table at once. Also need to clean up all the way down to at least the last .035 or so around the sides.
SeymourDumore
Diamond
- Joined
- Aug 2, 2005
- Location
- CT
I think the figure is 17 punds/square, so you've got around 200 max to work with.
Take away some for imperfections in the extrusion ...
Milling a pocket might work for keeping the projectiles down, but won't do much for tolerance....
Can you get away with a bigass plate, use a 3/8 EM to profile all your parts, then just bandsaw them apart at the end?
Take away some for imperfections in the extrusion ...
Milling a pocket might work for keeping the projectiles down, but won't do much for tolerance....
Can you get away with a bigass plate, use a 3/8 EM to profile all your parts, then just bandsaw them apart at the end?
NeilJ
Aluminum
- Joined
- Jul 29, 2008
- Location
- Melbourne, Australia
Think I would tap holes in the vac fixture . Drill the through holes in the part, then screw it down before the cleanup.
if the vacuum won't work, buy 1/4" thicker stock and use soft jaws to hold onto 1/8".
You can take heavier cuts, and push the tools.
Flip over and hog the stock to thickness.
The time saved will negate the price in thicker stock,if not save you money and time.
You can take heavier cuts, and push the tools.
Flip over and hog the stock to thickness.
The time saved will negate the price in thicker stock,if not save you money and time.
I would still make a fixture plate, not going to do 2 at a time in vise jaws it doesn't make sense not to use the full travel of the table and get a bunch of parts on at once. I was hoping that i could get away with the vacuum due to the light clean up that these parts need. I guess I am going to have to build a small 1 or 2 part test vacuum plate and see what happens, my next option is try some mitee bites and build a plate.
John Welden
Diamond
- Joined
- Mar 21, 2009
- Location
- Seattle
How many parts do you have to run?
allloutmx
Titanium
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- Mar 6, 2013
- Location
- Rochester, NY
Ultra violet glue
AARONT
Stainless
- Joined
- Feb 19, 2013
- Location
- Madison, WI
throw as many vises as you can on your table, make soft jaws and let the chips fly.
bukwerm
Cast Iron
- Joined
- Nov 6, 2013
- Location
- Minneapolis MN
Would that work with a material that uv light can't pass through?
allloutmx
Titanium
- Joined
- Mar 6, 2013
- Location
- Rochester, NY
make a fixture full of these puppies to hold 'er down. shine the light in from the side opposite the part
Scruffy887
Titanium
- Joined
- Dec 17, 2012
- Location
- Se Ma USA
Air pressure at sea level is 14.7 lbs/sq inch. That is the max hold down under perfect conditions. 176.4 total pounds. PSA fine sandpaper on the face of the chuck. And a flack vest.
vacuum chuck
Vacuum chuck works well to hold thin fragile films or small working pieces, I bought several vacuum chucks from Werlchem, a company from silicon valley, the chucks so far worked perfectly ,their website is www. chuck-table.com
Vacuum chuck works well to hold thin fragile films or small working pieces, I bought several vacuum chucks from Werlchem, a company from silicon valley, the chucks so far worked perfectly ,their website is www. chuck-table.com
TeachMePlease
Diamond
- Joined
- Feb 11, 2014
- Location
- FL
Oh, yes, and Werlchem having a trade mark of semixicon for their superconductor products has nothing to do with your forum name, or the fact that you bumped a 2 month old thread to post about vacuum chucks for use with thin films, even though they're not applicable at all.
Where do companies find such clueless PR people?
Begone, spammer.
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